Explore the intricacies of stellar physics in this Kavli Institute for Theoretical Physics Blackboard Lunch talk. Delve into the methods of studying stars, including chemical abundance analysis and global oscillation modes. Examine various star properties, nuclear time scales, and stellar structure. Understand the concept of thermal equilibrium and the importance of transport processes in stellar interiors. Discover the relevance of this research through observational data and learn about the challenges in numerical modeling, including resolving turbulence and accounting for rotation and magnetic fields. Gain insights into the cross-disciplinary nature of theoretical physics and its application to understanding stellar climate and transport phenomena.